Mailbox



FIG. 1 is a perspective view of a mailbox showing my new design, a portion of the mailbox being enclosed in a brick structure which is shown in broken lines for illustrative purposes only and which forms no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a mailbox, as shown and described. 